Set any item metadata on a non-built file.
Takes a list of Key=Value pairs. Tells the Visual Studio generator to set Key to Value as item metadata on the file.
For example:
set_property(SOURCE file.hlsl PROPERTY VS_SETTINGS "Key=Value" "Key2=Value2")
will set Key to Value and Key2 to Value2 on the file.hlsl item as metadata.
Generator expressions are supported.